| 摘要 |
<p>A fastening device is provided for fastening two parts together. The two parts for fastening together can be furniture parts. The fastening device may have two rotatable engagement slots for engaging with two dowels which are fixed to the parts being fastened together. The engagement slots have cam profiles such that when they are rotated by a user, the dowels, and thus the parts, are pulled together, and thereby fastened. The fastening device may have a gear mechanism that multiplies torque input to the fastening device by the user so as to provide greater rotational torque for fastening at the engagement slots. The invention also provides a tightening tool that may be used to provide an input torque to the fastening device. The tightening tool remains rigid below a threshold torque, but reversibly buckles when the threshold torque is exceeded. The invention also provides a ratchet for switching between a tightening mode and a loosening mode of the tightening tool.</p> |
